In the Dragon Ball universe, the power levels of characters can be difficult to compare, as they are constantly evolving and changing. However, based on what we know about the strength of both characters, it is unlikely that Beast Gohan could defeat Jiren in a one-on-one battle.
Firstly, let’s look at the power level of Jiren. Jiren is a member of the Pride Troopers, a group of powerful warriors from Universe 11. He is one of the strongest fighters in the Dragon Ball Super series and has been shown to possess incredible strength, speed, and durability. In the Tournament of Power, he easily defeated many powerful opponents, including Goku, Vegeta, and Frieza. In fact, it took the combined efforts of Goku, Vegeta, and Android 17 to finally take down Jiren.
On the other hand, Beast Gohan is a character that was introduced in the Dragon Ball Super manga. He is a version of Gohan that has fully embraced his Saiyan heritage and has become much more aggressive and powerful as a result. While Beast Gohan is undoubtedly strong, he has not been shown to be anywhere near as powerful as Jiren.
One thing that Beast Gohan does have going for him is his unpredictability. As an unpredictable fighter, he could potentially catch Jiren off guard with his unorthodox fighting style. However, Jiren is an experienced fighter and has fought against many powerful opponents, so it is unlikely that he would be caught off guard by Beast Gohan.
Another factor to consider is the difference in their power levels. Jiren’s power level is said to be over 100 times stronger than his fellow Pride Trooper, Toppo, who is himself a very powerful fighter. Beast Gohan, on the other hand, has not been given an official power level, but it is unlikely that he is anywhere near as strong as Jiren.
In terms of combat skills, Jiren has shown to be an incredibly skilled fighter. He has a wide range of techniques and can adapt to different fighting styles. Beast Gohan, on the other hand, is more of a brute force fighter and relies heavily on his raw power to overwhelm his opponents.
In conclusion, while Beast Gohan is a powerful fighter, it is unlikely that he could defeat Jiren in a one-on-one battle. Jiren’s incredible strength, speed, and durability, combined with his combat skills and experience, make him one of the toughest opponents in the Dragon Ball universe. While Beast Gohan’s unpredictability could potentially give him an advantage, it is unlikely that it would be enough to overcome Jiren’s overwhelming power.